Work/rest rounds
9 min 45 secWork
0:45
Rest
0:15
Rounds
10
Total
9:45
45 seconds work, 15 seconds rest, 10 rounds for a flexible training or drill block.
Custom work and rest rounds
Free Online Interval Timer
Build a simple interval timer for workouts, study blocks, rehearsals, drills, classroom rotations, and repeated work sessions. Set work time, rest time, and rounds, then run a large fullscreen phase display from the browser.
Built for this job
Work and rest phases are visible without reading small controls.
Round count keeps repeated sessions predictable for groups.
One flexible timer can cover fitness, study, classroom, and rehearsal use cases.
Work/rest rounds
Work
1/10
0:45
WorkBreak
Current phase0%
Total block9:45
45 seconds work, 15 seconds rest, 10 rounds for a flexible training or drill block.
Interval presets
Settings
Seconds apply before the next start. The final round ends after work, with no extra break added.
Controls
Create controlled roomUse this setup in XTimer
Need a controller link, viewer display, or shared room?
Keep this simple timer for quick work. Move into an XTimer room when one person controls the clock and another screen shows it to a speaker, team, class, or audience.
Presets that match real work
Start from a timer people already understand.
Each preset has a clear use case, duration, and workflow. That makes the page useful for search visitors immediately, and gives professional users a natural path into XTimer rooms when they need separate controller and viewer devices.
Study cycles
70 minWork
20:00
Rest
5:00
Rounds
3
Total
1:10:00
20 minutes focus, 5 minutes break, 3 sessions for study and revision.
Station rotation
20 min 30 secWork
3:00
Rest
0:30
Rounds
6
Total
20:30
3 minutes work, 30 seconds move time, 6 rounds for classrooms and workshops.
Boxing-style rounds
19 minWork
3:00
Rest
1:00
Rounds
5
Total
19:00
3 minutes work, 1 minute rest, 5 rounds for sparring, bag work, and conditioning.
Professional setup
Use the simple timer first, then graduate to controlled timing.
Use short rest periods for conditioning and longer rest periods for technical practice.
Keep the display large when the timer is used by a class or group.
Choose fewer rounds when the activity requires high quality effort.
Use Tabata or Pomodoro when you need a named format, and interval timer when you need custom rounds.
Frequently asked questions
What is an interval timer?
An interval timer alternates between work and rest phases for a set number of rounds. It is useful for workouts, study cycles, drills, classroom rotations, and repeated practice blocks.
Can I customize the work and rest time?
Yes. You can edit work seconds, rest seconds, and rounds before starting the timer.
Is this different from a Tabata timer?
Tabata is one specific interval format. This interval timer is more general, so you can build any work/rest structure you need.